Add numeric_only to func signature

Author: maushumee

pandas/core/groupby/groupby.py

@@ -4681,12 +4681,14 @@ def rank(
     @final
     @Substitution(name="groupby")
     @Substitution(see_also=_common_see_also)
-    def cumprod(self, *args, **kwargs) -> NDFrameT:
+    def cumprod(self, numeric_only: bool = False, *args, **kwargs) -> NDFrameT:
         """
         Cumulative product for each group.
 
         Parameters
         ----------
+        numeric_only : bool
+            Optional argument with default as False.
         *args : tuple
             Positional arguments to be passed to `func`.
         **kwargs : dict
@@ -4734,18 +4736,20 @@ def cumprod(self, *args, **kwargs) -> NDFrameT:
         horse  16  10
         bull    6   9
         """
-        nv.validate_groupby_func("cumprod", args, kwargs, ["numeric_only", "skipna"])
-        return self._cython_transform("cumprod", **kwargs)
+        nv.validate_groupby_func("cumprod", args, kwargs, ["skipna"])
+        return self._cython_transform("cumprod", numeric_only, **kwargs)
 
     @final
     @Substitution(name="groupby")
     @Substitution(see_also=_common_see_also)
-    def cumsum(self, *args, **kwargs) -> NDFrameT:
+    def cumsum(self, numeric_only: bool = False, *args, **kwargs) -> NDFrameT:
         """
         Cumulative sum for each group.
 
         Parameters
         ----------
+        numeric_only : bool
+            Optional argument with default as False.
         *args : tuple
             Positional arguments to be passed to `func`.
         **kwargs : dict
@@ -4793,8 +4797,8 @@ def cumsum(self, *args, **kwargs) -> NDFrameT:
         gorilla  10   7
         lion      6   9
         """
-        nv.validate_groupby_func("cumsum", args, kwargs, ["numeric_only", "skipna"])
-        return self._cython_transform("cumsum", **kwargs)
+        nv.validate_groupby_func("cumsum", args, kwargs, ["skipna"])
+        return self._cython_transform("cumsum", numeric_only, **kwargs)
 
     @final
     @Substitution(name="groupby")